rdma_resolve_addr

//$ gcc b2b_resolve_addr.c -o resolve_addr -libverbs -lrdmacm
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <rdma/rdma_cma.h>

int set_sockaddr(const char* ip_str, uint16_t port, struct sockaddr* saddr)
{
    struct sockaddr_in* sa_in = (struct sockaddr_in*)saddr;
    if (inet_pton(AF_INET, ip_str, &sa_in->sin_addr) == 1) {
        sa_in->sin_family = AF_INET;
        sa_in->sin_port   = htons(port);
        return 0;
    }   

    struct sockaddr_in6* sa_in6 = (struct sockaddr_in6*)saddr;
    if (inet_pton(AF_INET6, ip_str, &sa_in6->sin6_addr) == 1) {
        sa_in6->sin6_family = AF_INET6;
        sa_in6->sin6_port   = htons(port);
        return 0;
    }   

    return 0;
}

int main(void)
{
    const char* client_active_bind = "192.168.30.2";
    const char* server_passive_bind = "192.168.30.4";
    struct rdma_cm_id *id;
    struct sockaddr_storage dst_addr, src_addr;

    set_sockaddr(client_active_bind, 0, (struct sockaddr*)&src_addr);
    set_sockaddr(server_passive_bind, 8976, (struct sockaddr*)&dst_addr);

    rdma_create_id(NULL, &id, NULL, RDMA_PS_TCP);
    int ret = rdma_resolve_addr(id, (struct sockaddr*)(&src_addr), (struct sockaddr*)(&dst_addr), 2000);
    printf("%d\n", ret);
    printf("%s\n", ibv_get_device_name(id->verbs->device));

    return 0;
}